To most people, all VW bugs are the same. To a VW nut, every single nut, bolt or part is year significant.
The front boots are different on (not going into the finer details):
-pre 1967 Beetles......longer front bonnet
-Post 1968 Beetles......shorter front bonnet on the standard and deluxe versions (excluding Super Beetles)
-1302 Super Beetles......these are 1971 and 72 vintage. Shorter, bulbous front bonnet.
-1303 Super beetles......1973 to 78 vintage. Similar but not the same to the 1302. Front profile almost the same.
The headlights and tail lights are different amongst years. Again this is a long story.......simplified:
Headlights.....slopping on pre 67 models (like you see on the silver 65 here) or upright like you see on the rest of the cars.
-Pre 1961. I would not cover now.
-1962 to 67 (plus Standard Beetles uptil 1972) oval tail lights
-1968 to 72 (excluding Standard models) 'tombstone' tail lights
-1973 onwards.....'elephants foot' tail lights.
Hope that answers your query.